user and gropus mapping mapping

1- we have a already up and running user mapping configuration . the data mover client for NIS and the cifs server joined to AD

2- now the secmap build as UID to SID the data mover get the UID from NIS and get SID from active directory

3- my problem is this configuration cover the user mapping what about groups mapping how can i make sure that the groups from NIS and AD has right mapping

4- can i beside this runing  configuration use the groups local file or can i insert the groups mapping records in secmap manually

what i can do to let the data mover cover the groups mapping

in case need any out put or any file from our data mover pls let me know pls i need help in this

kindly advice